Zycoo CooVox-U80 User Manual page 130

Primary IP Address,
private network, you may use the private IP of the IPPBX to register your extension when
you are in the office. Secondary IP can be the public IP address of your office, if you are out
of office, CooCall will switch to the secondary IP to register to the IPPBX system as a remote
extension.
Username: An extension number.
Password: Password of this user extension.
Once information is complete, tap "Register" button to register to the IPPBX system. After
registered, you will see"Ready to call"displayedon the "Dialer" screen. You can now make phone
calls from the CooCall softphone just as you would make calls from any other IP phones.
Notice:
1. CooCall for iPhone works only with TCP transmission.Please enable TCP for the extensions which will be used by
CooCall softphone on the extension configuration page.
And you have to enable global TCP transmission support too. It's on Advanced‐>Options‐>SIP Settingspage.
Secondary IP Address: Normally your IPPBX system is deployed in a